The water level in a metric measuring cup is 0.75 L before the addition of a pebble weighing 150 g. The water level after submerging the pebble is 0.82 L.

Determime the density of the pebble.

The volume displaced by the pebble

= 0.82 - 0.75

= 0.07 L = 70 ml.

Mass of the pebble = 150 g.

Therefore, density of the pebble is,

Density = Mass/ Volume=150/70=2.14 gm${{L}^{-1}}$